Hypodermic needle



Feb. 17. 1925 E. A'. BOCK HYPCDERMIG NEEDLE Filed ec: 192. 5

I Z52 06727207," 2% mazkiiffig f? Patented Fe 17, 1925.

PATENT-OFFICE.

EDMUND A., BUCK, onn MMo-nn, TNIDIANA.

somenmuruc NEEDLE Application filed December a, 1922. Serial m. 673,229.

" 7'0 all whom it may concern: Be it knownthat I, EDMUND A. Boon, a citizen of the United States, residing at Hammond, in the county of Lake and State of Indiana, have invented a new and useful 1 Improvement in Hypodermic' Needles, of

which the following is a specification.

lhis invention relates to hypodermic needles and the like and is fully described in the following specification and shown in the accompanying drawings in which:

Figure 1 is a longitudinal sectional view of a hypodermic syringe embodyingthe invention;

Fig. 2 is a side elevation of a conical clamping member, and I Fig. 3 is an end elevation of the same.

The embodiment illustrated comprises a syringe 10 having a threaded'end ll onwhich is screwed an extension 12 having a longitudinal opening therein in alignment v with the opening of the end 11.

The outer end of the extension 11 has a threaded end 13 over which is screwed a nut 14 which has a hollow tapered chamber 15-.

A straight hollow needle 16 passes through the nut 1 1 and into the hollow ex tension 12 and if desired may'extend back into the 0 enin injthe end 11. This needle may be adiustahly moved in and out and is held in adjusted position by means of a conical clamping member 17 which is adapt ed to fit within the conical chamber 15, so that as the nut 14 is screwed down the clamping member 17 will be forced into .this chamber thereby causing the split jaws 18 to be forced inwardly to clamp and hold the needle 16 in any desired position.

A gasket 19 of rubber or'the like is preferably placed between the clamping member 7 and the end of the extension 13 so that when the nut is tightened the gasket will prevent leakage both around the needlev and around the clam-ping member 17.

. If desired, especially for short needles,

separate from and the extension 12 may be omitted and the nut 14 screwed directlyon the threaded end of the syringe barrel;

While I have shown and described certain embodiments of my invention, vit is to be understood that it is capable of many modifications. Changes, therefore, in the construction and arrangement may be made without departing from the spirit and scope of the invention as disclosed in the'appended claims, in whichit is my intention to claim all novelty inherent in my invention as broadly as possible in. view of the prior art.

I claim: I v

1. A needle fastening attachment for a hypodermic syringe including incombina tion, a hollow member for attachment to the syringe, a nut adapted to be screwed on said member having a conical opening spaced from the inner end of the nut, a conical clamping meansseparate from said member and nut and disposed in said opening, a

hollow needle passin throu' h said nut and low member adapted for attachment to a hypodermic syringe at its outlet and to re ceive-a hypodermic needle of the ordinary form into its bore, a conical clamping means ,zgmttiug the outer end of said member an through which said needle extends a'iiut attachable to said mem-- her and through which the needle passes, said lint having a conical openin to engage and cause compression of sa' clm'npiug' meansto' retain the needle.

In witness whereof I have hereunto set my hand and seal this 27 th'day of NOS/(Illber1923.

EDMUND A. BUCK. 

